Question

How did Louisiana became a state and when did it became a state?

Answer 1

On April 30, 1812, exactly nine years after the signing of the Louisiana Purchase, Congress admitted Louisiana as the eighteenth state in the Union.

Answer 2

The United States buys the territory from Napoleon for $15,000,000 in the Louisiana Purchase in 1803. The American citizens of Spain's West Florida territory take control of the government and declare it a republic in 1810. Louisiana becomes the 18th state to join the United States in 1812.